The intensive agriculture in Lielupe river basin,covering large areas on both sides of theborder, poses a threat of water pollution withnitrogen and phosphorus compounds that isa common concern of Latvia and Lithuania.The project objective is to complementLatvian and Lithuanian measures, introducedin accordance withthe requirements ofEU Water and Nitratedirectives and destinedto prevent waterpollution caused by theagricultural activities,with the joint soilmonitoring element.As the main results ofthe project a joint database on nitrogen andphosphorus content andits changes in the soils of Lielupe basin, thesoil element study with recommendationsfor decreasing the risk of water pollutionare being prepared and presented to localgrowers, producers and environmentalspecialists. The added value of cross-bordercooperation is reached by harmonizingthe work methods and principles ofagrochemical research centres, establishinga durable system of data exchange andcollection in Lielupe basin soils thus being afirst step for creating a joint long-term crossbordermonitoring system of nitrogen andphosphorus content in Lielupe basin soils.